<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<html lang="zh">
<head><title> 学习交流平台 </title></head>
<meta http-equiv="content-Type" content="text/html;charset=utf-8">
<body background="index.png"
style=" background-repeat:no-repeat;
        background-size:100% 100%;
        background-attachment: fixed;">
<br/>
<iframe src="a.txt" name=iframe1></iframe>
<div id=div1></div>
  <script>
    //在iframe1中已经显示有TXT文本的内容，下面代码是把TXT中的内容中的HTML标记取消，只取得文本
    var txtval=ifram1.body.innerText;
//把文本显示在div1中
div1.innerHTML=txtval;
  </script>


  <select>
      <option value ="volvo">Volvo</option>
        <option value ="saab">Saab</option>
          <option value="opel">Opel</option>
            <option value="audi">Audi</option>
  </select>

<form name = "input2" action = "/cgi-bin/login.cgi" method = "get" id = "form2">
  账号: <input type = "text"     name = "username"  required oninvalid="setCustomValidity('请输入账号');" oninput="setCustomValidity('');" /> <br/>
  口令: <input type = "password" name = "password" required oninvalid="setCustomValidity('请输入密码');" oninput="setCustomValidity('');" /> <br/>
<br/>
<div style="padding-left:93px;">
<input  type = "submit" value = "登陆"/>
<a  href="/reg.html">注册账号</a><br/>
</div>
<select>
      <option value ="volvo">Volvo</option>
        <option value ="saab">Saab</option>
          <option value="opel">Opel</option>
            <option value="audi">Audi</option>
  </select>

</form>














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</body>
</html>
